I think the correct answer is Hemoglobin. Hemoglobin is necessary for the transport of oxygen by an erythrocyte. It is a protein molecule found in red blood cells made of four subunits; two alpha subunits and two beta subunits. This protein is responsible for carrying of oxygen to body cells and tissues, and carbon dioxide to the lungs.
Answer:
endothermic
Explanation:
Because the value of the heat of reaction is positive .
For many solids<span> dissolved in liquid water, the </span>solubility increases<span> with </span>temperature<span>. The </span>increase<span> in kinetic energy that comes with </span>higher temperatures<span> allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.</span>
Answer:
32 g
Explanation:
The increase in the boiling point of X can be calculated using the following expression.
ΔT = Kb × b
where,
ΔT: increase in the boiling point
Kb: molal boiling point constant (0.62 °C.kg/mol) (I looked it on the web)
b: molality of the solute
ΔT = Kb × b
(124.7°C - 124.2°C) = (0.62 °C.kg/mol) × b
b = 0.81 mol/kg
The mass of X is 650 g (0.650 kg). Then, the moles of urea (solute) are:
The molar mass of urea is 60.06 g/mol. The mass of urea is:
Molars are the kind of teeth mammals use to grind food